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-rw-r--r--drivers/char/snsc.h5
-rw-r--r--drivers/char/snsc_event.c32
-rw-r--r--drivers/sn/ioc4.c41
3 files changed, 46 insertions, 32 deletions
diff --git a/drivers/char/snsc.h b/drivers/char/snsc.h
index a9efc13..8a98169 100644
--- a/drivers/char/snsc.h
+++ b/drivers/char/snsc.h
@@ -5,7 +5,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved.
*/
/*
@@ -70,6 +70,9 @@ struct sysctl_data_s {
#define EV_CLASS_TEST_WARNING 0x6000ul
#define EV_CLASS_PWRD_NOTIFY 0x8000ul
+/* ENV class codes */
+#define ENV_PWRDN_PEND 0x4101ul
+
#define EV_SEVERITY_POWER_STABLE 0x0000ul
#define EV_SEVERITY_POWER_LOW_WARNING 0x0100ul
#define EV_SEVERITY_POWER_HIGH_WARNING 0x0200ul
diff --git a/drivers/char/snsc_event.c b/drivers/char/snsc_event.c
index baaa365..a4fa507 100644
--- a/drivers/char/snsc_event.c
+++ b/drivers/char/snsc_event.c
@@ -5,7 +5,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved.
*/
/*
@@ -187,7 +187,8 @@ scdrv_event_severity(int code)
static void
scdrv_dispatch_event(char *event, int len)
{
- int code, esp_code, src;
+ static int snsc_shutting_down = 0;
+ int code, esp_code, src, class;
char desc[CHUNKSIZE];
char *severity;
@@ -199,9 +200,25 @@ scdrv_dispatch_event(char *event, int len)
/* how urgent is the message? */
severity = scdrv_event_severity(code);
- if ((code & EV_CLASS_MASK) == EV_CLASS_PWRD_NOTIFY) {
+ class = (code & EV_CLASS_MASK);
+
+ if (class == EV_CLASS_PWRD_NOTIFY || code == ENV_PWRDN_PEND) {
struct task_struct *p;
+ if (snsc_shutting_down)
+ return;
+
+ snsc_shutting_down = 1;
+
+ /* give a message for each type of event */
+ if (class == EV_CLASS_PWRD_NOTIFY)
+ printk(KERN_NOTICE "Power off indication received."
+ " Sending SIGPWR to init...\n");
+ else if (code == ENV_PWRDN_PEND)
+ printk(KERN_CRIT "WARNING: Shutting down the system"
+ " due to a critical environmental condition."
+ " Sending SIGPWR to init...\n");
+
/* give a SIGPWR signal to init proc */
/* first find init's task */
@@ -210,12 +227,11 @@ scdrv_dispatch_event(char *event, int len)
if (p->pid == 1)
break;
}
- if (p) { /* we found init's task */
- printk(KERN_EMERG "Power off indication received. Initiating power fail sequence...\n");
+ if (p) {
force_sig(SIGPWR, p);
- } else { /* failed to find init's task - just give message(s) */
- printk(KERN_WARNING "Failed to find init proc to handle power off!\n");
- printk("%s|$(0x%x)%s\n", severity, esp_code, desc);
+ } else {
+ printk(KERN_ERR "Failed to signal init!\n");
+ snsc_shutting_down = 0; /* so can try again (?) */
}
read_unlock(&tasklist_lock);
} else {
diff --git a/drivers/sn/ioc4.c b/drivers/sn/ioc4.c
index ea75b3d..67140a5 100644
--- a/drivers/sn/ioc4.c
+++ b/drivers/sn/ioc4.c
@@ -31,7 +31,7 @@
#include <linux/ioc4.h>
#include <linux/mmtimer.h>
#include <linux/rtc.h>
-#include <linux/rwsem.h>
+#include <linux/mutex.h>
#include <asm/sn/addrs.h>
#include <asm/sn/clksupport.h>
#include <asm/sn/shub_mmr.h>
@@ -54,11 +54,10 @@
* Submodule management *
************************/
-static LIST_HEAD(ioc4_devices);
-static DECLARE_RWSEM(ioc4_devices_rwsem);
+static DEFINE_MUTEX(ioc4_mutex);
+static LIST_HEAD(ioc4_devices);
static LIST_HEAD(ioc4_submodules);
-static DECLARE_RWSEM(ioc4_submodules_rwsem);
/* Register an IOC4 submodule */
int
@@ -66,15 +65,13 @@ ioc4_register_submodule(struct ioc4_submodule *is)
{
struct ioc4_driver_data *idd;
- down_write(&ioc4_submodules_rwsem);
+ mutex_lock(&ioc4_mutex);
list_add(&is->is_list, &ioc4_submodules);
- up_write(&ioc4_submodules_rwsem);
/* Initialize submodule for each IOC4 */
if (!is->is_probe)
- return 0;
+ goto out;
- down_read(&ioc4_devices_rwsem);
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_probe(idd)) {
printk(KERN_WARNING
@@ -84,8 +81,8 @@ ioc4_register_submodule(struct ioc4_submodule *is)
pci_name(idd->idd_pdev));
}
}
- up_read(&ioc4_devices_rwsem);
-
+ out:
+ mutex_unlock(&ioc4_mutex);
return 0;
}
@@ -95,15 +92,13 @@ ioc4_unregister_submodule(struct ioc4_submodule *is)
{
struct ioc4_driver_data *idd;
- down_write(&ioc4_submodules_rwsem);
+ mutex_lock(&ioc4_mutex);
list_del(&is->is_list);
- up_write(&ioc4_submodules_rwsem);
/* Remove submodule for each IOC4 */
if (!is->is_remove)
- return;
+ goto out;
- down_read(&ioc4_devices_rwsem);
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_remove(idd)) {
printk(KERN_WARNING
@@ -113,7 +108,8 @@ ioc4_unregister_submodule(struct ioc4_submodule *is)
pci_name(idd->idd_pdev));
}
}
- up_read(&ioc4_devices_rwsem);
+ out:
+ mutex_unlock(&ioc4_mutex);
}
/*********************
@@ -312,12 +308,11 @@ ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
/* Track PCI-device specific data */
idd->idd_serial_data = NULL;
pci_set_drvdata(idd->idd_pdev, idd);
- down_write(&ioc4_devices_rwsem);
+
+ mutex_lock(&ioc4_mutex);
list_add(&idd->idd_list, &ioc4_devices);
- up_write(&ioc4_devices_rwsem);
/* Add this IOC4 to all submodules */
- down_read(&ioc4_submodules_rwsem);
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_probe && is->is_probe(idd)) {
printk(KERN_WARNING
@@ -327,7 +322,7 @@ ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
pci_name(idd->idd_pdev));
}
}
- up_read(&ioc4_submodules_rwsem);
+ mutex_unlock(&ioc4_mutex);
return 0;
@@ -351,7 +346,7 @@ ioc4_remove(struct pci_dev *pdev)
idd = pci_get_drvdata(pdev);
/* Remove this IOC4 from all submodules */
- down_read(&ioc4_submodules_rwsem);
+ mutex_lock(&ioc4_mutex);
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_remove && is->is_remove(idd)) {
printk(KERN_WARNING
@@ -361,7 +356,7 @@ ioc4_remove(struct pci_dev *pdev)
pci_name(idd->idd_pdev));
}
}
- up_read(&ioc4_submodules_rwsem);
+ mutex_unlock(&ioc4_mutex);
/* Release resources */
iounmap(idd->idd_misc_regs);
@@ -377,9 +372,9 @@ ioc4_remove(struct pci_dev *pdev)
pci_disable_device(pdev);
/* Remove and free driver data */
- down_write(&ioc4_devices_rwsem);
+ mutex_lock(&ioc4_mutex);
list_del(&idd->idd_list);
- up_write(&ioc4_devices_rwsem);
+ mutex_unlock(&ioc4_mutex);
kfree(idd);
}
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